Seat armrest



FIG. 1 is a perspective view of a seat armrest, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a front elevation view thereof;

FIG. 7 is a rear elevation view thereof;

FIG. 8 is an enlarged portion perspective rear view thereof; and,

FIG. 9 is an enlarged portion perspective front view thereof. 

I claim the ornamental design for a seat armrest, as shown and described. 